package com.shenmazong.core;

import java.util.ArrayList;

/**
 * @program: server-java-demo
 * @description: DataType03
 * @author: 亮子说编程
 * @create: 2020-10-15 16:56
 **/
public class DataType03 {

    public static void main(String[] args) {

        int i=1,a=0;
        System.out.println("a=i++ ===>  "+(a=i++));
        System.out.println("a=++i ===>  "+(a=++i));

        int i1 = new Object().hashCode();
        int i2 = new String().hashCode();

        ArrayList arrayList = new ArrayList();
    }
}
